EP 1780690 A1 20070502 - Flat display apparatus and picture quality controlling method based on panel defects
Title (en)
Flat display apparatus and picture quality controlling method based on panel defects
Title (de)
Flachanzeigegerät und auf Bildschirmfehlern basierendes Bildqualitätssteuerungsverfahren
Title (fr)
Appareil d'affichage plat et procédé de contrôle de la qualité des images basé sur les défauts de panneau
Publication
Application
Priority
KR 20050100927 A 20051025
Abstract (en)
A flat panel display device may improve picture quality by compensating a panel defect by use of a circuit and a picture quality controlling method. A flat panel display device includes a display panel. A memory (116) stores a location information and a compensation value for a panel defect location on the display panel. A first converter (120) calculates a brightness and color difference signals from red, green, blue video signals to be displayed in the display panel. The first converter expands the number of data bits of the brightness signal to generate the expanded brightness signal. A compensating part (115) generates a compensated brightness signal by increasing or decreasing the expanded brightness signal of the video signal to be displayed in the panel defect location. A second converter (121) calculates the red, green, blue signals from the color difference signal and the compensated brightness signal, and generates the compensated video signal by reducing the number of bits of the calculated red, green, blue signals. A drive circuit drives the display panel by use of the compensated video signal and the uncompensated video signal.
IPC 8 full level
G09G 3/20 (2006.01)
CPC (source: EP KR US)
G09G 3/006 (2013.01 - EP US); G09G 3/20 (2013.01 - EP KR US); G09G 3/36 (2013.01 - KR); G09G 5/10 (2013.01 - KR); G09G 3/3648 (2013.01 - EP US); G09G 2320/0233 (2013.01 - EP US); G09G 2320/0285 (2013.01 - EP US); G09G 2330/10 (2013.01 - EP US)
Citation (search report)
- [XA] EP 1225557 A1 20020724 - MATSUSHITA ELECTRIC IND CO LTD [JP]
- [XA] US 2005116917 A1 20050602 - AOKI TORU [JP]
- [A] US 2003222841 A1 20031204 - HIROSUE YOJI [JP]
- [PA] EP 1659564 A1 20060524 - SAMSUNG ELECTRONICS CO LTD [KR]
Designated contracting state (EPC)
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU LV MC NL PL PT RO SE SI SK TR
Designated extension state (EPC)
AL BA HR MK YU
DOCDB simple family (publication)
EP 1780690 A1 20070502; EP 1780690 B1 20100804; AT E476731 T1 20100815; CN 100565632 C 20091202; CN 1956032 A 20070502; DE 602006015888 D1 20100916; JP 2007122008 A 20070517; JP 4638384 B2 20110223; KR 101127843 B1 20120321; KR 20070044711 A 20070430; TW 200717386 A 20070501; TW I346919 B 20110811; US 2007091041 A1 20070426; US 7839395 B2 20101123
DOCDB simple family (application)
EP 06012124 A 20060613; AT 06012124 T 20060613; CN 200610087168 A 20060615; DE 602006015888 T 20060613; JP 2006168227 A 20060619; KR 20050100927 A 20051025; TW 95123351 A 20060628; US 47722806 A 20060629